91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
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/*
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* Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MEDIA_BASE_VIDEOFRAME_H_
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#define WEBRTC_MEDIA_BASE_VIDEOFRAME_H_
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#include "webrtc/base/basictypes.h"
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#include "webrtc/base/stream.h"
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#include "webrtc/common_video/include/video_frame_buffer.h"
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#include "webrtc/common_video/rotation.h"
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namespace cricket {
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// Represents a YUV420 (a.k.a. I420) video frame.
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class VideoFrame {
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public:
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VideoFrame() {}
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virtual ~VideoFrame() {}
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// Basic accessors.
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// Note this is the width and height without rotation applied.
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virtual int width() const = 0;
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virtual int height() const = 0;
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// Returns the underlying video frame buffer. This function is ok to call
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// multiple times, but the returned object will refer to the same memory.
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virtual const rtc::scoped_refptr<webrtc::VideoFrameBuffer>&
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video_frame_buffer() const = 0;
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// System monotonic clock, same timebase as rtc::TimeMicros().
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virtual int64_t timestamp_us() const = 0;
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virtual void set_timestamp_us(int64_t time_us) = 0;
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// Deprecated methods, for backwards compatibility.
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// TODO(nisse): Delete when usage in Chrome and other applications
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// have been replaced.
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virtual int64_t GetTimeStamp() const {
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return rtc::kNumNanosecsPerMicrosec * timestamp_us();
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}
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virtual void SetTimeStamp(int64_t time_ns) {
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set_timestamp_us(time_ns / rtc::kNumNanosecsPerMicrosec);
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}
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// Indicates the rotation angle in degrees.
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virtual webrtc::VideoRotation rotation() const = 0;
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// Make a shallow copy of the frame. The frame buffer itself is not copied.
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// Both the current and new VideoFrame will share a single reference-counted
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// frame buffer.
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virtual VideoFrame *Copy() const = 0;
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// Return a copy of frame which has its pending rotation applied. The
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// ownership of the returned frame is held by this frame.
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virtual const VideoFrame* GetCopyWithRotationApplied() const = 0;
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// Converts the I420 data to RGB of a certain type such as ARGB and ABGR.
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// Returns the frame's actual size, regardless of whether it was written or
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// not (like snprintf). Parameters size and stride_rgb are in units of bytes.
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// If there is insufficient space, nothing is written.
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virtual size_t ConvertToRgbBuffer(uint32_t to_fourcc,
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uint8_t* buffer,
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size_t size,
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int stride_rgb) const;
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// Tests if sample is valid. Returns true if valid.
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static bool Validate(uint32_t fourcc,
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int w,
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int h,
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const uint8_t* sample,
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size_t sample_size);
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protected:
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// Creates an empty frame.
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virtual VideoFrame* CreateEmptyFrame(int w,
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int h,
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int64_t timestamp_us) const = 0;
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virtual void set_rotation(webrtc::VideoRotation rotation) = 0;
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};
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} // namespace cricket
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#endif // WEBRTC_MEDIA_BASE_VIDEOFRAME_H_
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